Revolving door



Aug. 13, 1935. E. PEREMl ET AL 1 REVOLVING DOOR v Filed may 26, 1932 7 Sheets- Sheet 1 INVENTORS form/v0 HERE/w BY 'l/ARLES ff/5H WM r 670622,

ATTORNEYS 7 Sheets-Sheet 2 EpPEREMI ET AL REVOLVING DooR Filed May 26, 1952 Aug. 13, 1935, I

Aug. 13, 1935. E. PEREMI ET AL 2,010,825

REVOLVING DOOR Filed May 26, 1952 7 Shts-Sheet 3 Aug. 13, 1935. E. PEREMI ETAL RE V'OLVING DOOR 7 Sheets-Sheet 5 Filed May 26, 1932 l NVENTORS EDMUND P585 CHAR/.55 ff/fl ATTORNEYS Aug. 13, 1935. E, PER MI ET A 2,010,825

REVOLVING DOOR Filed May 26, 1952 7 Sheets-Sheet 6 lNVE. 0R5 form/v0 E/PE/V/ CHARLES /r/5// ATTORNEYS Aug. 13, 1935. E. PEREMI ET AL REVOLVING DOOR 7 Shts-Sheet 7 Filed May 26, 1932 l NVENTORS E m pmwm R w NA A mew Patented Aug. 13, 1935 UNITED STATES PATENT-OF ICE 2,010,825 REVOLVING noon Edmund Peremi, Manhasset, and Charles Kish, Elmhurst, N. Y., assignors to General Bronze Corporation, Long Island City, N; Y., a corpora- I tion'of New York Application May 26, 1932, Serial No. 613,602

14 Claims.

mount leaves in such a way that they will not sag or get out of alignment, either when in radially operative position or whencolla'psed. Ow-

ingto the positive and firm pivotal support of the door leaves, and tothe iact that sagging anjd twisting of the door leaves are prevented when they are being folded, the pivoting of the door leaves is easily accomplished without danger of the leaves becoming jammed. It is also possible to make the door with close clearances between the parts, particularly between the inner vertical edges of the leaves and the door column, with out danger of binding between the surfaces at those points. In this way a weathentight door is secured.

Other objects ofthe invention are to provide improved weather stripping means for the door, to provide an improved trolleyconstruction for supporting the door,'and to provide improved op-' erating devices for the central door pivot and trolley latch operating head. a 7

Other objects and advantages of the invention will appear from the description of certain preferred embodiments thereof, chosen to illustrate the principles of the invention.

In the accompanying drawings which illustrate such preferred embodiments; Figure 1 is a front elevation of a door, showing the door enclosure in section;

Figure 2 is a plan view of the door with the ceiling and parts aboveomitted, and showing thedoor enclosure in horizontal section; Figure 3 is a view partly in elevation and part-, ly in central vertical section illustrating one pre- 'ierred' form of the invention and showing the 45 lower part of the door column, leaves, and lower hinge connections of the leaves to-the door column, and showing the bottom pivot of the door and socket for receiving the same.

cf the door leaves; l Figure 5 is a horizontal section taken substan- Figure 4 is a vertical sectional View on line of Figure 3 showing the construction of one tially on line 5-5 of Fig. 3 showing two of the I door leaves folded;

Figured is aperspective view of one of the leaf supporting blocks illustrated inFigures 3 and 5; 1 I Figure '7 is a view partly in elevation and partly in central vertical section of a modified construction of door, parts being broken away; Figure 8 is a horizontal sectional view taken substantially on line 88 of Figure 'L'showing two of the door leaves folded; Figure 9 is a section on line 99 of Figure 7; Figure 19 is a view partly in elevation and partly in central vertical section of the upper part of another form of door;

Figure 11 is a similar view showing part of the same door; a V

Figure 12 is a fragmentary view partly in seethe lower tion showing the central part of the same door;

Figure 13 is a vertical sectional view of the central part of the door column shown in Fig-, ure 12, the section being at right angles to the sectionlshown in Figure 12;

Figure 14 is a fragmentary view in elevation of the portion of the door column shown in Figures l2 and 13; l l

Figure 15 is a horizontal sectional view taken on line' i,5-i5 .of Figure 11, looking upward, showing two of the door leaves folded;

Figures 16 and 17 are vertical sectional views taken, on lines l6--l6 and,l'll'l respectively of Figure 11; v a a l.

Figure 18 is a vertical sectional view takenon line i8-l8 of Figure 10, on a larger scale;

Figure 19 is a horizontal sectional view of the side portion of a door leaf showing aconstruc tion'of weather stripping;

Figure 20 is a similar view showing a modified form of weather stripping;

Figure 21 is aview partly in elevationand partly in centralvertical section showing the lower part of another modified form of revolving door;

Figure22 is a horizontalsection taken substantially on line 22-22 of Figure 21, looking upward; .7 V A Figure 23 is a horizontal sectional view online 23-23 of Figure 21;

Figure 24 is a view similar to Figure 21 showing another modified construction of door; Figure 25 is a horizontal sectional view taken substantially on line 25 25 of Figure 24, looka ing upward, showing two of the door leaves folded;

Figure 26 is a central vertical sectional view showing the upper hinge construction of another modified form of revolvingdoor, the ceiling of the door enclosure being-also shown in the sec tion and said figure also showing in vertical section a construction of supporting trolley for the door; a

Figure 27 is a horizontal sectional View on line Ql-Ti of Figure 26, showing all the door leaves folded;

Figure 28 is a horizontal sectional view on line 28-28 of Figure 26 showing two of the door leaves folded;

Figures 29 and 30 are fragmentary views in elevation, and Figure 31 is a fragmentary view partly in elevation and partly in vertical section, showing a construction of latch for operating the lpivot slide of the door, the sectional part of Figure 31 being a section taken on line 3l-3l of Figure 30.

Referring to the drawings in detail, particularly' to Figures 1 and2, revolving doors of the character involved in the present invention comprise a central column ii? which is mounted to rotate about a vertical axis and which is suspended in a suitable manner in the door enclo- "sure i!,"and which carries a plurality of door leaves- 54. Preferably the column All is suspended from'a trolley d2 which is mounted to travel on a horizontal track 63 extending across the-top of the door enclosure and above the ceiling 44 thereof. The latter. is provided with a slot-45 through which the door column passes. At the bottom of the door column is a retractable pivot bolt i6 which is received in a socket 4'! located at the center of the floor of the door enclosure, a second socket Ll? being preferably provided near the side of the door enclosure to receive the pivotwhen the door is collapsed and moved to one side. Latches t9 and 56 may advantageously be provided upon the track 43 to secure the trolley at oneor the other limit of itsmovement. Mounted on the column it] are 1 the door leaves 54, usually four in number, these leaves being attached to the column by suitable hinge mechanisms, preferablylocated near the upper and lower ends of the leaves, as indicated at 55. While four leaves are illustrated and four leaves are usually used in these doors, a different number of leaves may be utilized if the layout of the building requires. For instance three leaves are sometimes employed, which leaves woulcl'be mounted in a manner similar to that described. These hinge mechanisms permit the door leaves to be folded so that the door' may be collapsed and moved to oneside of the door enclosure as indicated in dotted lines in Figure 2. y, As Will be understood, one or more of the door leaves may be folded, and in some instances the door leaves may be folded two and two, so as to extend in diametrically opposite positions from the central column, in a well understood manner. Suitable means are provided with retaining the door leaves in spaced radial position during operation, such for instance as the chains "6b. These chains are preferably releasably secured to the leaves in any suitable manner, for instance in one of the manners shown incur. applications for patent, Serial No. 585,270, and Serial No. 5920M. By the use of suitable releasable connections be tween the door leaves, the latter may either be released manually when it is desired to collapse the door and moveit to one side, or such releasable connections will give way .upon the applicationof excessive pressure to opposite leaves of the'door, such as mayQoccurin the case of a panic, and thereby permit free passage through both sides of the door.

Referring particularly to the form of door ly convex as shown at H32.

shown in Figures 3 to 6 inclusive, the central column of the door comprises a strong support ing tube it which has two pairs of discs '55 and ?2 mounted and keyed thereon, the lower pair only being shown in Figure 3. It will be understood that a similar hinge construction to that shown in Figure 3 is mounted near the top of the door. The disc 7! is provided with gear teeth l3 pref rably extending part Way only across its face. The disc 52 is spaced from the disc H by a flange l5 and has in its face nearest to the disc '15 an annular groove or track A plurality of supporting blocks 36 are mounted in the space between the discs H and '52, each block having a curved lug 8i thereon, which slides in the groove 75. Each block has a por tion projecting beyond the discs in which is a hole 82. A pair of blocks is provided for each leaf of the door, one block being located between the discs of the top hinge 55 of the door and one block being located between the pair of discs of the bottom hinge 55. Each door leaf is provided with hinge fittings 9% which are slotted to receive the blocks til, and each hinge fitting is pivoted to its block by means of a pivot pin 95. Eachhinge fitting is also provided with a gear segment 92, theteeth of which mesh with the gear teeth l3.

Figure 3 shows the bottom hinge fittings, it being understood that the leaves are provided at the topwith similar hing-e fittings alsohaving gear segments meshing with the teeth on the upper disc similar to H. Where door leaves of metal construction are utilized, each leaf preferably has near its top and bottom a pair of horie zontal frame bars such as the channels 55 and 95 located just far enough apart to'receive the hinge fittings between them. This provides a very strong and rigid support for the hinge fittings.

Surrounding the supporting tube 78 of the central column, between the upper and lower hinges, is a sleeve i536, and this sleeve and the adjacent edges of the door leaves are suitably shaped to provide weather proof joints when the leaves are in radial position. As shown, the sleeve is provided with four shallow, concave depressions l ill, and the edges of the door leaves are made slight Owing to the manner of supporting and pivoting the leaves, by which sagging and twisting thereof are prevented, the clearances between the bottoms of the depressions sea and the edges of the door leaves may be made close without danger of binding. To assist in locating the .door leaves in their radial po sitions, when the leaves are unfolded from collapsed position, eachblock 88 carries a bullet catch m5 and in the bottom of the groove 76 in the disc l2 four sockets are formed, spaced 90 apart, to receive such catches.

When the leaves are moved from their radial positions to folded positions, as indicated by two of the leaves in Figure 5, it will be seen that the lugs 53! of'the blocks 8 slide in the grooves l6 and that the gear segments 92 roll around the teeth in the d sc li. During this operation the leaves pivot about the pins 8!. As each leaf has a gear segment near each end, it is constrained to move in a definite path, both ends of the leaf necessarily turning at the same speed so that twisting or tilting of the leaf is not possible, and perfect alignment is secured at all times. Lugs 8! travelling in the grooves l8 formvery firm supports for the leaves and they can be folded and unfolded without danger of sagging. The

door construction forme l years ,As commonly employed, however, the gear segments have been of comparatively large radius with reference to the gears or pinions carried by. the central column. One result of this has been that when the four door leaves were folded, the ends of the segments on some of the leaves projected beyond the planes of the adjacent 1eaves,,and it was necessary to cut away pqrtions of the leaves to clear such -segments. As a consequence either the.

doors were not wind proof, or it was necessary to use spring flaps or other eXpe-dients for tern-- pcrarily closing these openings. We havediscovered, however, that byusing substantially larger gears onthe central column, and by making the radius of each segmentcorrespondingly small, it is possible tofold the leaves into parallelism without having the ends of the segments on one leaf reach the plane of an adjacent leaf. In this way no recesses orspring flaps are required in the leaves. I If the proportion between the radii of the gears and segments is properly chosen, the outer folded leaves, as represented by the lower left hand leaf in Figure 5, clearboth the periphery of the toothed discs 52 and the segments on the adjacent leaves, so that a perfectly plane surfaced, unrecessed leaf can be utilized. To accomplish the desired result, the ratio between the radius of the toothed disc and the ra dius of each segment should not be less than two to one, and in the construction shown this ratio is three to one, and this ratiomost satisfactorily ccomplishes the desiredresult. It will be noted that with a leaf fully folded, the center of the pivot 95 of the folded leaf does not quite reach the diameter of the toothed disc at l5 from the initial position of the leaf, but this does not prevent the leaf from folding into ,a positionparallel to the otherfolded leaves because the ratio of the gear radii is such that the surface of the leaf will clear the periphery of the toothedidisc.

' The elimination of recesses and spring flaps in the leaves is a valuablefeature, asit permits'the leavesto present a smoothly finished appearance,

, avoids the weakening of the leaves with cutouts,

avoids moving parts which may get out of order,

and reduces cost.

In Figures 7 8 and 9, a modified construction of door is shown in which the door leavesare pivoted to supporting blocks somewhat similar to the supporting blocks shown in the form of door described above, but in which a pin and slot construction is utilized for controlling the movement of. the leaves and keeping them in alignment, in place of the segment and gear construction described. Referring to these figures, lil. is the.

supporting tube of the door column and to this are fixed discs H0, in near thetop of the door, and

discs I I2, HEB near the bottom of the door. Each ofthe dis-cs has an annular groove or track H4 therein. Mounted to slide incircular paths between the discs are the supporting blocks l5,

eachof which is provided with a pair of .guid-e lugs Elli which slidein the grooves or tracks I M in the pairs of discs. The leaves are pivoted to the projecting arm portions of corresponding pairsyof supporting blocks by means of pivot pins Ill which are carried in hinge fittings li8 mounted in the leaves. Mounted near the upper and lower ends of the supportingtube' lli'are the cross-members I andli! l, each of which is provided with four radial guide slots I22.

ranged to slide in these guide slots and thereby compel the leaves. to foldin determinate paths when pivoted about the pivots H1. The pin and slotconstruction alsov maintains the top andbot tom of each leaf in alignment. The hinge fittings of the leaves are preferably provided with bullet catches. which are adapted to engage in the Each of the leaves is provided with guide pins l23 ar guide slots'when the leaves are in radial position.

The lugs l 56 and the inner ends of the supporting blocks I I5 areso shaped that when the leaves are folded into parallel position, the adjacent faces of the blocks and lugsof the inner, pair of leaves will come into contact, thereby stopping these leaves in parallel position and assisting in preventing themirom sagging or getting out of alignmerit. In order to permit the leaves to be closely folded, as shown in the lower left hand side of Figure 8, the leaves are recessed as indicated at ii'iil toreceivethe ends of the arms of the crossmembers. Spring flaps l3l are provided at each side of these recesses and hinged on fittings H8 so as to close the recesses Hill when the leaves are in radial position, andthereby prevent the passage of drafts. Thesupporting tube 10 is preferably enclosed within a sleeve 548 which is suit- 7 ably formed to make weather tight joints with the edges of the leaves. As shown, in Figure 9, sleeve M3 is provided with the concave recesses M! which receive the'convexedges I' l-2 of the leaves;

In Figures 10 to 17, inclusive, another modified construction of door is-shown. i0 is the supporting tube which has fixed near itsupper and lower ends discs l5! Each of these discs has in its lower face a circumferential guide'groove or track E52. which preferably is of polygonal form with rounded corners. Also formed in the lower face or each discare four radial guide grooves I 55 which intersect the circumferential guide grooves i252. Each of the leaves 56 is provided with upper and lower hinge fittings ids and I51 respectively and 'clearly shown in Figure 15. When the door leaves are in radial position, the faces of these blocks will seat firmly against the outer walls of the round cornered portions-of the circumferential grooves, spanning the grooves I55; as-sh-own at the righthand side of Figure 15. blocks I55 and pivots l 58 thus pro-videmeansfor supporting the leaves firmly and preventing sagging. Each V of the pins l59 carries at its end a guide block 555 which slides in one of the radial guide grooves 555. These blocks I85, sliding in the radial grooves, serve to constrain the leaves to move in definite pathswhen being closed or opened, and prevent the tops and bottomsof the leaves from getting out of alignment. Blocks J50 are preferablymade of such length that the adjacent ends of the blocks on thextwo inner leaves will come into contact when the' leaves are folded into par-. allelism, thereby stopping and assisting in supporting these leaves in such parallel position. To permitthe leaves to be closely folded, asshown at the left hand side of Figure 15, each of the leaves is provided with recesses ill) to receive the projecting portions of the corresponding discs. Suitable flap means mounted in the hinge fittings are provided for closing these recesses when the door leaves are in'radial position, so as to prevent the passage of drafts. Asshown in Figures 10,11, 15,16 and 17, a single flap member H! is provided centrally in each recess, such flap member being hinged along itslo-wer edge, as shown at H2, and having at one end a projecting lug i173 which is engaged by the flat head it'd of a plunger 6T5 mounted in a recess in the hinge fitting, andurged upwardly b'y'a spring H6; When the'fiap is pushed to oneside or the other, by

engagement with the edge o'f'the'disc E51, as shown in Figure 15, the projection H3 will force down the plunger H5 and upon release of the pressure on the fiap,-the spring lit will raise the plunger and return the flap to vertical position.

In the construction above described, the supporting tube is of the central door column is enclosed within a sleeve 88B extending between the upper and lower discs E55, the sleeve it!) being of smaller diameter than the column sleeves shown in the modifications described above, and having concave recessed portions Mil depressed therein, the inner surfaces of the bottoms of which'contact with the surface of the supporting tube Til, thereby giving added strength and assisting in preventing 3 accidental deformation of the sleeve.

In Figures 12, 13, and 14, a construction for locking the operatingdevice for the central door pivot and for the trolley latches is illustrated, this locking'device being applicable to any of the door constructions shown or other similar door constructions. As will be understood, the door has a central pivot 35 at the bottom of the column and a latch operating head led at the top of the column (see Fig.1). These two members are con nectedby' rods lei with a slide 592 located at a convenient point in the door column. 'The slide N32 has ahole m3 therein adapted to 'receive a suitable key or tool i941 (Fig. 13), which may be inserted intothe hole through a slot 195 in the sleeve led and a slot N6 in the supporting tube l8, -A sliding shield i9? is preferablyprovided for closing all butthe lowest part of the slot W5, the shield being mounted to slide between the tube; '50 and the sleeve H88 and being limited in its movement by the engagement of a flange 528 on the back of the shield with the head of a'screw lei! inserted in the tube til Attached to the side of the tube 'ufi'opposite to the slot we is a block 295' having two recesses therein, in which are mountedrespectively locking pins 2M and 282, each of which is normally urged inwardly by a spring 2%j 'When the slide m2 is in its lower positiomas shown'i'n Figure 13, the locking pin 2635 wi l enter the hole 593 and prevent the slide 592 "from moving upwardly, thereby positively lockingfthe bottom pivot of the door in its socket When it'is desired to collapse and shift the door to the side of its enclosure, the key Hi l is inserted in the hole M3 and pushed against the end of the pin 2e .therebypushing said pin out of the hole l93, andpermittingthe slide .l92to be moved upwardly by mea'ns of the key. When the slide has been moved to its upper position'with the pivot and trolley latch disengaged, the'hole E93 sapphire-to the locking pin 252 and upon the withdrawal of the key I94 this pin'will snap into the hole and retain the slide in'raised position until the key is again inserted 7 Figures 16 to 20 inclusive show a suitable construction of weather strip which may be used with any of the revolving 'doors shown, or with other revolving door constructions. Figures 16 and 1'7 show the bottom strip for the door, comprising a flexible strip 2 i 53 of felt, rubber or the like mounted in the bottom channel of a door leaf by means of the clamping strips 2i i which may be of wood, metal, or other suitable material Figure 18 shows a construction of weather strip at the top of the door leaf, comprising a strip 2 l 5 of felt, rubber or other suitable flexible material clamped between a pair of serrated jaws H6 and 2 ii. The jaw 2H5 is formed on the channel member 2118, fixed to the top rail of the door leaf, while the jaw 21? is formed on a curved strip member 2% which is remcvably attached to the opposite flange of the channel member 2 58 from that which carries the fixed jaw 256. The removable jaw strip 22d has a rib 22! on its inner edge which bears in a groove 222 in the side of the channel member H8, and clamping screws 223 are provided by which the strip 22$ may be drawn towards the flange of the channel member 2 l8 and thereby firmly clamp the weather strip between the serrated jaws. This construction holds the weather strip very firmly at the same time permits its adjustment in case of wear or replacement. Figure 19 shows a similar construction applied to the weather strip at the side of the door leaf which engages the inner surface of the door enclosure ii. The weather strip at the side of the door leaf preferably comprises a tapered rubber strip 225 which has attached to its edge a wear strip 226 of felt, composition rubber or the like. Figure 20 shows a modified construction of weather strip at the side of the door leaf in which a tapered composition rubber, felt or the like, weather strip 230 is employed which carries a wear strip 226 and which has an enlarged base 23! which is received in a groove 232 formed in the edge of the door leaf. One wall 233 of the roove is made removable so as to permit insertion and removal of the weather strip.

' In Figures 21, 22 and 23 another form of hinge construction for securing the door leaves to the central door column is illustrated. As shown in these figures, the supporting tube it! of the door column has fixed to its lower end a disc 2%, it being understood that a similar disc, not shown, is secured to the upper end of the tube. The disc 2 35 is of somewhat polygonal outline and has at each of the corners a vertical notch 24!. In the top face of the disc 240 is an annular groove or track 242 and in the lower face of the disc are out four radial grooves 2&3, the walls of which merge into the diverging curved surfaces 2 l l, as shown in Figure 22, so as to form what may be described as flaring mouths for the grooves. Mounted below the disc 242 and fixed thereto is a cross-member 259 having four short arms, in the end of each of which is a notch 25L The door leaves 54 are each provided with a lower hinge fitting 255 and with a similar upper hinge fitting not shown. Mounted in each hinge fitting is a pin 256 which carries a guide roller 25! travelling in the annular guide groove or track 2 52. Each hinge fitting also carries a pin 25%} which is adapted to travel in one of the radial grooves 243 and which follows one of the diverging curvedsurfaces 2M when the door leaf is folded, as shown at the left hand side of its body ring so as to lie in the same plane as the Figure 22. The hinge fittings are alsoprovided with lugs 263 adapted to engage with the proper notches I when the leaves are fully collapsed, so as to supportthe leaves against sagging in i that position. The adjacent lugs 263 on the hinge fittings of the inner pair of leaves are adapted to contact when the leaves are folded into parallel position so as to stop the leaves in that position. Each leaf is 'firmly supported andtop and bottom of each leaf in thecorresponde ing annular grooves in the discs and by the engagement of the pins 269m the radialgrooves When the leaves are fully folded orient the 2-43. lugs 263 on each of the outerleaves, the pins 2600f which have left the radial grooves 2 33, will engage with one of the notches 251 and thereby firmly support such leaves against sagging, As in the forms of door described above, the supporting tube ill of the door is enclosed within a suitable sleeveZlll, as shown in Figure 23. In order to enable theleaves to fold closely the t are slotted asindicated at 215, so 'as'to receive the edges of the discs 240. Tofclose the outer part of such slots when the leaves, are in radial position, spring flaps 276 are provided which are pivoted on Vertical pivots 2T1. When the leaves are in radial position; the ends of these flaps 'extend into the grooves 24L Another form ofydoor hinge construction is shown in Figures 24 and 25 which is similar in many respects to the construction shown in Figures 21 to 23. In thisconstruction upper and 3 lower discs are fixed to the supporting tube 10,

the lower disc only *being shown at 290. Each 3 l of these discs has a -guide groove or track 29I in its upper face, the groove being formed of four arc shaped sections as indicated in Figure'25, adjacent sections joining in; the cusp likeinter- SectionsZSZ. v

In the lower face of the disc are formed radial grooves 293, the walls of which merge intooutwardly divergingwalls 254 so as to form flaring mouths for thegrooves. Fixed in the 'lower'face of the disc are four bearing pins 295. The door leaves are provided with hingefittings 286 which carrypins 291 on the ends of which are mounted rollers 298'which travel-in the circumferential guide grooves 29L The hinge fittings also carry pins 300 which travel in the radial grooves 293, andwhich, when'the door leaves are completely folded as shown at the lower left side of Fig lure 25 travel on the curved surfaces 294. The

hinge fittings 296 are' also provided withlugs 393 adapted to engage with the proper pins 295 when the door leaves are fully collapsed so "as to support the leaves against sagging when in that position. The adjacent lugs 303 on the inher pair of leaves are adapted to contact when the leaves are folded into parallelism, and thereby -stop the leavesin that position. To prevent leakage through the slots in the leaves which ared-ormed to clear theedges of the discs 290, spring flaps 305 are provided.

Referring to Figures'26 to 28 inclusive, these 'show a'no ther modified formof revolving door in which the supporting tube 10 has rotatably mounted upon it near its upper end, a set of four hinge arms, one of which is pivoted to each door leaf; A 'si-milar 'set offhinge arms (not shown) ismounted on'the lower part oi the" tube 119.-

These hinge arms comprisebody rings'3l0 and arm portions '3! l and are arranged in pairs, one

arm portion of each said pairs being offset from arm projecting from the body ring in the other member of thepair. The two pairs of arms are spaced from one another and between them is fixed to the tube ii! a pinion 3 I 5;" The body rings on the arms are retained against longitudinal movement in any suitable manner as by collars Sit and 3|? fixed to the tube 19, which collars also securely hold in position the sleeve sections The door leaves are provided with hinge fittings at 320 which carry pivot pins 3H passing through holes in the ends of their respective hinge arms. Each of the hinge fittings 320 is also provided with a gear segment 323, the segments on two opposite leaves being located in one plane and th segments on the two leaves at right angles thereto being located in a different plane, but all said se ments being constantly in mesh with the pinion 3I5. j For locating the leaves in alinement with the hinge arm when opening the door, that is, moving its leavesinto radial position, bullet.

These two pairscomprise ends' of segments 323, while vertically hinged flaps 336 are engaged and moved out of the way by the pivot-arms. l y

-In Figure 26 an improved trolley construction is illustrated which is applicable to any of the forms of revolving door described or other similar doorsi This construction comprises a trolley body 3% mountedon wheels 34! which run on the tracks 43; In the center of the trolley bodyis a spherical cup 342-with an opening 343 in the bottom, through whichthe supporting tube 70 projects. Mounted to slide in the spherical cup is a bearing block 3 l5 havinga spherical bottom suriacefitting the spherical cup and having a recess ,at the top thereof which receives an antifrictionbearing 341. Mounted on the upper endof the tube m is a block 3&8 which is preferably adjustably secured screw thread 3 39. The block 348 preferably'has a skirt 35il, whichprojects over theupper edge of the block 34-5 so as to prevent dust from getting into the bearing. A latch strike plate 352 is mounted on the trolley by means of supporting" bracltets 3'53 and engages with one or the other of thepivoted latching devices 49 or 56 shown in 'Figure 1. The construction of these latches is more fully described and claimed in our applica tion,Serial No, 585,270, filed January'l, 1932. t Figures 29,30 and 31 illustrate an improved ating'the slide 360 to which are connected the rods 361 and 362 which operate the latchreleasing' head'andbottompivot for the door. The

slide operating devices comprise a; pi 363 fixed in the slide '360a'nd passing-through a slot 364 in'the tube '19, and a slot 365' in the outer face 0f, one of the yvertica'l ribs 3.65 of the sleeve 36? bolt construction which maybe utilized for opermo Qui s r di l pos pai w l a nst thisrib and close and conceal theslot; 3 55 and tha de ow slide o e a n arm 31c. W n.

slide raised;

this door leaf is swung to one side, however, the

arm may be moved outwardly, whereupon it may therein and the invention embodied in other ii Q l fie 1W3 don the fo desire to limit ourselves to the specific constructions illustrated,

but intend to cover ourinvention broadly in whatever form itsprinciple may be utilized.

W claim: V, V d 1. In a revolving door, a central supporting column, a pluralityoi door leaves, a disc mounted on the colun n and having a circumferential track therein, supporting membersfor the leaves including blocks having sliding non-rotative en.-

gagement in said track, and outwardly extending arms rigid with said blocks and having pivotal connections with v the respective leaves outside said track, and means for constraining said leaves to move in, predetermined paths when folded.

"2. In a revolving door, a central supporting column, a plurality of door leaves, discs mounted on the column and having circumferential tracks therein, supporting members for said leaves in-l cludirigelongated block portions shaped to slide without rotating in said tracks, pivots connecting said leaves with said supporting members outside thecircumferences of said tracks, and means on the central support disposed wholly 'within the paths of said pivots forv constraining the leaves to move in predetermined paths when moved about said pivots. I I p 3. In a revolving door, a central supporting column, a plurality of door leaves, discs mounted on said column having circumferential tracks therein, supporting arms for theleaves having block portions sliding in said tracks and arm .por-

tions projecting radially outward beyond said tracks, and pivots connecting said leaves with said projecting arm portions at points outside of said tracks' 4, In a revolving door, a central supporting column, a plurality of door leaves, discs mounted on said column having circumferential tracks therein, supporting arms for the leaves having block' portions sliding in said tracks and arm portions projecting radially outward beyond the peripheries of said discs, and pivots connecting said leaves with'said projecting arm portions at points outside of the peripheries of said discs.

5. In a revolving door, a central supporting column, a plurality of door leaves, upper and lower pairs of discs mounted on said column, leaf supporting, arms mounted between each pair of discs and projecting beyond the peripheries thereof,at least o'ne disc of each pair having a circumferentialtrack in that face thereof nearest to'the companion disc, each of said sup porting arms having a portion sliding in said track, and pivots connecting the projecting portions of said supporting arms with the respective leaves. I a 1 a '6.-In a revolving door, a central supporting column, a plurality of door .leaves, upper and lower pairs of discs mounted on said column, leaf uppor inaa m u ed be we n e h r o arms having a portion slidingin said track, and pivots connecting the projecting portions of said supporting arms with the respective leaves, at least one of each of said pairs of discs having gear teeth thereon, and gear segments on each leaf meshing withsaid gear teeth.

'7. In a revolving door, a central supporting col umn, a plurality door leaves, upper and lower pairs of discs mounted onsaid column, leaf supporting arms mounted between each pair of discs and projecting beyond the peripheries thereof, at least one disc of eachpair having a circumferential track in that face thereof nearest to the companion disc, each of said supporting arms having a portion sliding in said track, pivots connecting the projecting portions of said supporting arms with the respective leaves, at least one of each of said pairs of discs having gear teeth thereon, and gear segments on each leaf meshing'with said gear teeth, the radii of the toothed portions. of said discsbeing. not less than twice the radii of the gear segments of the leaves.

8. In a revolving door, a central supporting column, a plurality of door leaves, upper and lower pairs of discs mounted on said column, leaf supporting arms mounted between each pair of discs and projecting beyond the peripheres thereof, at least one disc of each pair having a circumferential track in that face thereofnearest to the companion disc, each of said supporting arms having a portion sliding in said tracli, pivots connecting the projecting portions of said supporting arms with the respective leaves, at least one of eachof' said pairs of discs having gear teeth thereon, and gear segments on each leaf meshing with 'said gear teeth, theratio of the radii ofv the toothed portions of said discs to the radii of said gear segments beinglsuch that the leaves maybefolded into parallelism without contact between the inner iaces'of the two outer door leaves and the ends of the teeth. on either the discs or gear segments of the adjacent door leaves, and without interference between the gear segments on the inner adjacent leaves. g

9. In a revolving door, a central supporting column, a plurality of door leaves, means for pivotally supporting each leafso that it may have pivotal movement about an axis lying between the side planes of. the leaf and parallel to the column axis and so that it may also have pivotal movement about the axis of said central column, and cooperating means controlling the relations of the movements of'the leaves about said axes, comprising a toothed disc fixed to said column and common to all the leaves, and a gear segment fixed on each leaf concentric with the outer pivot thereof and outside said toothed disc for meshing with said toothed disc, the radius of said toothed disc being not less than twice the radius of; one of said segments. 7

a 10. In a revolving door, a central supporting columma plurality of door leaves, means for pivotally supportingeach leaf so that it may have pivotal movement about an axis lying between the sideplanes of the leaf and parallel to the column axis and so that it may also have pivotal movement about the axis of said central column, and cooperating means controlling the relations li h e nt o the av bputsaidaxes,

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' comprising a toothed disc fixed to said column and common to all the leaves, and a gear segment fixed on each leaf and meshing with said toothed disc, the radius of said toothed disc being substantially three times the radius of one of said limited rotative movement about said column,

pivots connecting said leaves to said supporting arms, and gear segments carried by said leaves ments being such that when theleaves are folded into substantial parallelism the inner planes of the two outer leaves will clear the ends of the teeth on the toothed discs and on the segments on the adjacent door leaves, whereby no recessing of the leaves is required to clear such teeth when the leaves are folded.

12. In revolving door construction, a central supporting column, a plurality of leaves, hinge members for all of the leavescarried by said column in a common plane perpendicular to the column, each leaf being pivotally connected with one of the hinge members, and opposed guide I members fixed on the central support and pro- ,vid'mg opposed, parallel faces at opposite sides of the plane of the hinge members for supporting and guiding the hinge members in said plane, one of said guide members being recessedto interfit ,with portions of all the hinge members to control movements of the latter in said plane.

13. In a revolving door, a central supporting column, a plurality of door leaves, upper and lower pairs of discs mounted on said column, leaf supporting arms mounted between each pair of discs and projecting beyond the peripheries thereof, at least one disc of each pair having a circumferential track in that face thereof nearest to the companion disc, each of said supporting arms having a portion sliding in one of said tracks,

pivots connecting the projecting portions of said supporting arms with the respective leaves at points spaced from the inner edges of said leaves, cross-arm members fixed to said supporting column, said members having radial guide slots therein, and guide pins carried by said leaves near the inner edges thereof and arranged to slide in said radial slots] 14. In a revolving door, a central supporting column, a plurality of door leaves, discs mounted on the column having circumferential tracks therein, supporting members for said leaves including block portions shaped to slide without rotating in said tracks, the block portions attached to a pair of adjacent leaves being adapted to contact when said leaves are folded in parallelism, pivots connectiiig said leaves with said supporting members, and means for constraining the leaves to move in predetermined paths when moved about said pivots.

EDMUND PEREMI. CHARLES KISH. 

